[TowerTalk] Fwd: Insulated elements, Yes - No?

[Hans Hammarquist via TowerTalk]

Usually you want to keep the non-split element non-split  due to mechanical reasons. You do impair the structural strengths by splitting them even if you add material afterwards. Try the method of coupling with a coil in proximity to the element-under-test (EUT). It works pretty well.


Hans - N2JFS







-----Original Message-----
From: Edward Sawyer <SawyerEd at Earthlink.net>
To: towertalk <towertalk at contesting.com>
Sent: Wed, Aug 6, 2014 10:55 pm
Subject: Re: [TowerTalk] Insulated elements, Yes - No?


The question was asked about determining resonance of elements that are not
"split".  What I do, is "split em" to do a normal R/X measurement as a
radiating dipole and then connect a shorting wire after the measurement and
tuning to make them as design intended.  Way Way easier than farting around
with a grid dip meter.  And if the consistency of a long rigid element is
necessary, then use a "one size up" sleeve of Al and run a couple of bolts
through it to re-establish a rigid element.  For accuracy, make your split
gap very small (1/4 inch) and make sure your connection is either right at
the element or a half wave multiple away if using feed line (which is often
the case to get something up in the air enough to de-couple from ground).

 

Ed - N1UR

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